Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
objtool/klp: Correlate locals to globals
Allow correlating original locals to patched globals, and vice versa.
This is needed when:
1. User adds/removes "static" for a function.
2. CONFIG_LTO_CLANG_THIN promotes local functions and objects to global
and add .llvm.<hash> suffix.
Signed-off-by: Song Liu <song@kernel.org>
Link: https://patch.msgid.link/20260305231531.3847295-8-song@kernel.org
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
authored by
Song Liu
and committed by
Josh Poimboeuf
4b57e97b
cdea5cad
+30
+30
tools/objtool/klp-diff.c
+30
tools/objtool/klp-diff.c
···
517
517
}
518
518
}
519
519
520
+
/* Correlate original locals with patched globals */
521
+
for_each_sym(e->orig, sym1) {
522
+
if (sym1->twin || dont_correlate(sym1) || !is_local_sym(sym1))
523
+
continue;
524
+
525
+
sym2 = find_global_symbol_by_name(e->patched, sym1->name);
526
+
if (!sym2 && find_global_symbol_by_demangled_name(e->patched, sym1, &sym2))
527
+
return -1;
528
+
529
+
if (sym2 && !sym2->twin) {
530
+
sym1->twin = sym2;
531
+
sym2->twin = sym1;
532
+
}
533
+
}
534
+
535
+
/* Correlate original globals with patched locals */
536
+
for_each_sym(e->patched, sym2) {
537
+
if (sym2->twin || dont_correlate(sym2) || !is_local_sym(sym2))
538
+
continue;
539
+
540
+
sym1 = find_global_symbol_by_name(e->orig, sym2->name);
541
+
if (!sym1 && find_global_symbol_by_demangled_name(e->orig, sym2, &sym1))
542
+
return -1;
543
+
544
+
if (sym1 && !sym1->twin) {
545
+
sym2->twin = sym1;
546
+
sym1->twin = sym2;
547
+
}
548
+
}
549
+
520
550
for_each_sym(e->orig, sym1) {
521
551
if (sym1->twin || dont_correlate(sym1))
522
552
continue;